Well, I have 1 of these hooked up to a Sony XM-ZZR3301, which is giving it 600w rms. To be honest, when I first hooked it up, I was a little disappointed because it was not getting as loud as I thought it would, but after a few weeks of breaking it in, it did seem to get a bit louder. So overall, I'm pretty pleased. This sub will hit a wide range of notes, I was surprised at some of the low notes it could hit. And if you turn up the volume, it will get loud. I would recommend this sub to anyone, although I would probably recommend getting 2 if you have the space/money, unfortunately I was on a tight budget.